[Hectic]

Yeah sounds okay. If you want a quiet aeg you need to meet a few basics. Great shimming and motor height, sorbo pad, bearing bushings (optional), a light weight piston/piston head combo, and the lightest spring you can run effectively (for outdoor any spring around 350-380ish is good, for indoor 280-330ish m90 is perfect for indoor).
The main noise after that will simply be a dulled thud from the impact of the piston head to cylinder, and the whine of tbe motor, to eliminate alot of that go to a high speed gear (either 13:1 or 16:1, 16:1 is fine and goin 13:1 on an outdoor setup will likely need a motor and big battery to run like my 430+fps 32bbps vfc 417, built for trigger response not rof.) And with the highspeed gears a mosfet and 11.1lipo, the trigger response will be fast so the soud will seem "quiet" because thebmotor will run for a shorter time.